.side_nav {
  width: 400px;
  text-align: center;
  font-size: 18px;
  border: 1px solid gray;
  float: left;
  margin-right: 50px;
}
.side_nav li {
  height: 60px;
  line-height: 60px;
  font-weight: 600;
  background-color: blanchedalmond;
}
.side_nav li a {
  color: black;
  display: block;
}
.side_nav li a:hover,
.side_nav li .nav_active {
  background-color: darkcyan;
  color: whitesmoke;
}
.side_nav .disabled {
  background-color: #b3b39d;
}
.content {
  width: 1000px;
  height: 800px;
  float: left;
  position: relative;
}
.content h2 {
  font-size: 40px;
  font-weight: 100;
  padding: 20px;
}
.content form {
  font-size: 20px;
}
.content form label {
  font-weight: 600;
  display: block;
  padding: 20px 0 10px 0;
}
.content form p {
  margin: 0 10px;
}
.content form input {
  font-size: 20px;
  margin: 0 10px;
}
.content form #birthday,
.content form #nickname,
.content form .input {
  width: 600px;
  height: 40px;
  padding: 0 10px;
}
.content form textarea {
  margin-left: 10px;
  width: 600px;
  height: 100px;
  padding: 0 10px;
  font-size: 20px;
}
.content form button {
  margin: 10px;
  display: block;
  width: 100px;
  height: 50px;
  font-size: 20px;
}
.content form .avatar {
  width: 300px;
  float: left;
  position: absolute;
  top: 0;
  right: 0;
}
.content form .avatar img {
  display: block;
  width: 200px;
  height: 200px;
}
.content form .avatar button {
  margin: 10px 0 0 0;
  width: 200px;
  height: 40px;
}
.content form button:hover {
  cursor: pointer;
  background-color: burlywood;
  color: whitesmoke;
}
.content .delete p {
  margin: 20px 0;
}
.content .delete a {
  display: block;
  width: 100px;
  height: 40px;
  background-color: #df2020;
  color: white;
}
.content .delete a:hover {
  background-color: red;
  color: wheat;
}
